office-gobmx/include/vcl/BitmapGaussianSeparableBlurFilter.hxx
Caolán McNamara e3c8f4978a Related: rhbz#1602589 rework to avoid bogus cppcheck double free warning
Change-Id: Ie673de68f39b903536c2287b8989fe6afcc9fd66
Reviewed-on: https://gerrit.libreoffice.org/58307
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
2018-07-30 13:59:29 +02:00

52 lines
1.8 KiB
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#ifndef INCLUDED_VCL_BITMAPGAUSSIANSEPARABLEBLURFILTER_HXX
#define INCLUDED_VCL_BITMAPGAUSSIANSEPARABLEBLURFILTER_HXX
#include <vcl/BitmapFilter.hxx>
#include <vector>
class BitmapEx;
class VCL_DLLPUBLIC BitmapGaussianSeparableBlurFilter : public BitmapFilter
{
public:
BitmapGaussianSeparableBlurFilter(double fRadius)
: mfRadius(fRadius)
{
}
/** Separable Gaussian Blur filter and accepts a blur radius
as a parameter so the user can change the strength of the blur.
Radius of 1.0 is 3 * standard deviation of gauss function.
Separable Blur implementation uses 2x separable 1D convolution
to process the image.
*/
virtual BitmapEx execute(BitmapEx const& rBitmapEx) override;
private:
double mfRadius;
bool convolutionPass(Bitmap& rBitmap, Bitmap& aNewBitmap, BitmapReadAccess const* pReadAcc,
int aNumberOfContributions, const double* pWeights, int const* pPixels,
const int* pCount);
static std::vector<double> makeBlurKernel(const double radius, int& rows);
static void blurContributions(const int aSize, const int aNumberOfContributions,
const std::vector<double>& rBlurVector,
std::vector<double>& rWeights, std::vector<int>& rPixels,
std::vector<int>& rCounts);
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */